These are the packages that would be merged, in order:

Calculating dependencies  ..... ...... done!
[ebuild   R   ] media-video/mplayer-1.0.20070427  USE="3dnow 3dnowext X a52 aac alsa arts dvb dvd dvdread encode esd ftp gif iconv joystick jpeg mad mmx mmxext mp3 musepack opengl oss png quicktime rar sdl sse svga tga truetype unicode vorbis win32codecs xv xvid -aalib (-altivec) -amr* -bidi -bindist -bl -cddb -cdparanoia -cpudetection* -custom-cflags -debug -dga -directfb -doc -dts -dv -dvdnav* -enca -fbcon -ggi -gtk -ipv6 -ivtv -jack -libcaca -lirc -live* -livecd -lzo -md5sum -mp2* -nas -openal -pnm* -radio* -real -rtc -samba -speex -srt -sse2 -theora -tivo -v4l -v4l2* -vidix* -x264 -xanim* -xinerama -xvmc* -zoran" VIDEO_CARDS="-mga -s3virge -tdfx -vesa" 0 kB 

Total: 1 package (1 reinstall), Size of downloads: 0 kB